For those interested in computation with triangulations and normal surfaces:
It’s been a while coming, but Regina 4.90 finally went live last week! This is the release that was previewed at the HyamFest. There have been many changes since the last release 2+ years ago: see what’s new in this version, or check out the user handbook to learn more about what Regina can do.
If you use GNU/Linux, Regina is easy to install (just download a package). If you use MacOS, it’s still complex (you need fink) but the end result is much cleaner than ever before (it feels and behaves like a native Mac app).
See some screenshots after the jump, or head across to regina.sourceforge.net to learn more.
Regina working with triangulations:
Working with normal surfaces and angle structures:
Scripting with Python: